File extensions and folder

Folder structure

  • The folder structure is organized folder in sites and jobs.

  • All files belonging to a specific job - including GFD4 - are stored in a dedicated folder named after the job.


  • Site1.site

    • Job1.job

      • Job1.gfd4

      • Job1.raw

    • Job2.job

      • Job2.gfd4

      • Job2.raw


  • The site folder also includes specific folders for imported and exported data, external references and code lists.


  • Site1.site

    • _Export

    • _Import

    • _ExternalReference

    • _Codes



File extensions

  • *.GFD4: the proprietary extension for X-PAD jobs. Every job is saved in a file with *.GFD4 extension.

  • *.GFD4_BAK: when opening a job, a copy is created automatically with *.GFD4_BAK extension. This file is created to offer a backup file for the main job file.

  • *.RAW: when closing a job, the RAW file is created with *.RAW extension; the RAW file is a text file reporting all essential data of the job: topographic points and measures. The RAW file can be used by third-party software to import data or to restore a GFD4 file.

  • <name of the job>_IMG: sketches linked to points or to the measurement fieldbook are saved in a sub-folder of the job folder. The name of the sub-folder is <name of the job>_IMG.